The screen seems better than the 140s/145s I've seen in the fact that it doesn't need as much adjusting. I've had to adjust 140s and 145s even when starting them up. It does have ghosting with windows, but I think that's common on passive matrix displays. (Using a white desktop pattern instead of a grey one helps too--mine will be set as such as soon as I get the new hard drive in there).
The most interesting part about this display is that it has a bluish tint to it. The border around the screen is blue and when looking at the display from across the room it almost looks light blue (it doesn't look this way up close--it looks as black and white as any other passive matrix).
Yes, the passive matrix was a dying breed by the time the 150 hit the end of its life (1995). However, I think it's actually more usable than the earlier passive matrix displays--I like this display much better than that of the 140/145/145B/160 since there isn't as much adjustment that needs to take place.
Just for the record, my 150 was manufactured during the 33rd week of 1995, making it one of the last ones to roll off the line.
One question about 150s--did they come with floppy drive doors like the other 100 series PowerBooks? Mine doesn't have one and the eject hole is in a different place than it is on my 180c (which has a door) or on the 170 I parted out last spring (which also has a door).